CHym performance under different regions

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Presentation transcript:

CHym performance under different regions A. Martinez O. Garcia Y. Mahmoud Fourth Workshop on Water Resources in Developing Countries: Hydroclimate Modeling and Analysis Tools | (smr 3125) – ICTP (12-23 June. 2017)

Study Objectives Test the CHym model performance with different datasets in humid and arid regions Identify the typical simulated values and seasonal behavior Look at the response of the simulated discharge and different ENSO phases

Case (1): Tropical South America

Atrato River: CHyM: Country: Colombia Area : ~ 38000 km2. Length: ~ 750 km. In one of the rainiest places in the Americas. CHyM: Area : 34147.2 km2. DEM: NASA

Rainfall: TRMM Precipitation rarely exceeds 60 mm/day. Discharge peaks exceed 4000 m3/s. Notice the differences in the axes! Rainfall: ERAIN Precipitation can exceed 80 mm/day. Discharge can be as high as 30000 m3/s !.

Precipitation event started around 18UTC on the 12th. Peak precipitation at 00UTC on the 13th. Peak discharge at 12UTC on the 14th (~ 36 hours after peak precip.).

Case (2): Central America

Motagua Basin (Guatemala) Actual area 15 132 km2 CHyM calculated area 15 369 km2 Domain: Central America -91.50, 14.00 to -87.47, 16.68 250 x 150 cells (435 x 298.2 km2) Resolution 0.018 deg (1971 m) Years Simulated: 2000(strong La Niña) 2013 (Neutral) 2015(strong El Niño) Data Sources: HydroSheeds DEM TRMM Precipitation ERA dataset Temperatures Spin-up time of 1 month Default values for cpar!

The differences between years are clear when the daily discharges are compared.

Case (3): Egypt - Flood 2010

The experiment tests the CHym hydrology model over Egypt as an Semi arid/Arid region with observation (ERA-Interim) and climate model Simulation (RegCM output) Nlon = 800 Nlat = 1200 Slat = 28.4 Slon = 22.0 Dij = 0.0009 Demf = Nasa Chym_sdate= 2009010100 to 2011010100 Chym_dsource = ‘EIN75’ & ‘AFR44-MPI-rcp8.5’ Chym Setting Area: 1,010,407.87 km2 Climate Classification : Dry climate Annual Prec. : 250-350 mm/year

ERA-Interim Results Total Rainfall in Jan. Rainfall 18 Jan.2010 Discharge 18 Jan.2010 Discharge in Jan.

RegCM (MPI-ESM-MR of rcp8.5) Results Discharge Jan.2010 Rainfall Jan.2010

Evap. Jan.2010 of ERA Evap. Jan.2010 of RegCM Cont. RegCM Results

Thank you for your attention